package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;
import java.nio.file.CopyOption;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 发送验证码
     *
     * @param phone
     * @param session
     * @return
     */
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.不符合返回错误信息
            return Result.fail("手机号格式错误!");
        }
        //3.生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4.保存验证码到redis 有效期两分钟
//        session.setAttribute("code",code);
        redisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY + phone,code,RedisConstants.LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //5.发送验证码 TODO 这里先用自建方法代替真正的验证码发送方式
        log.debug("发送短信验证码成功，验证码：{}",code);
        return Result.ok();
    }

    /**
     * 用户登录
     *
     * @param loginForm
     * @param session
     */
    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误!");
        }
        //2.校验验证码
//        Object cacheCode = session.getAttribute("code");
        Object cacheCode = redisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if(cacheCode == null || !cacheCode.toString().equals(code)){
            //3.不一致，报错
            return Result.fail("验证码错误");
        }
        //4.一致，根据手机号查询用户
        User user = lambdaQuery().eq(User::getPhone, phone).one();
        //5.判断用户是否存在
        if(user == null){
            //5.5不存在创建用户并保存
            user = createUserByPhone(phone);
        }
        //todo 保存用户信息到redis中
        //随机生成token
        String token = UUID.randomUUID().toString(true);
        //将user对象转化为hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user,UserDTO.class);
        //存储到redis todo 要给用户信息设置有效期
        Map<String, Object> map = BeanUtil.beanToMap(userDTO,new HashMap<>(),CopyOptions.create()
                .setIgnoreNullValue(false)
                .setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString()));
        stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY+token,map);
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token,RedisConstants.LOGIN_USER_TTL,TimeUnit.SECONDS);
//        //6.保存用户信息到session
//        session.setAttribute("user", BeanUtil.copyProperties(user, UserDTO.class));
        return Result.ok(token);
    }

    private User createUserByPhone(String phone){
        User user = new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX +RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
